Inkjet printing apparatus and printhead driving method
AssigneeCanon Kabushiki Kaisha
InventorsYusuke Imahashi, Takashi Inoue
Life of this patent
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Abstract
An object of this invention is to decrease the amount of ink mist while keeping the image quality high in inkjet printing. To achieve this object, printing is performed by time-divisionally driving, for each block, a plurality of nozzles for discharging ink. In preliminary discharge, the nozzles are so driven as to set the driving time interval between neighboring nozzles to the first time interval. In printing, the nozzles are so driven as to set the driving time interval between neighboring nozzles to the second time interval longer than the first time interval.
Claims6
An inkjet printing apparatus which prints by time-divisionally driving, for each block, a plurality of nozzles for discharging ink, the apparatus comprising:
- first driving means for driving the plurality of nozzles so as to set a driving time interval between neighboring nozzles in preliminary discharge to a first time interval;
- and
- second driving means for driving the plurality of nozzles so as to set the driving time interval between neighboring nozzles in printing to a second time interval longer than the first time interval.
An inkjet printing apparatus which prints an image by time-divisionally driving a plurality of nozzles for discharging ink, the apparatus comprising:
- first driving means for driving the plurality of nozzles so as to set a driving interval between adjacent nozzles in preliminary discharge to a first interval;
- and
- second driving means for driving the plurality of nozzles so as to set the driving interval between adjacent nozzles in image printing to a second interval longer than the first interval,
- wherein the number of satellite droplets discharged when said first driving means drives the plurality of nozzles is smaller than the number of satellite droplets discharged when said second driving means drives the plurality of nozzles.
A method of driving a printhead which prints by time-divisionally driving, for each block, a plurality of nozzles for discharging ink, the method comprising steps of:
- driving the plurality of nozzles so as to set a driving time interval between neighboring nozzles in preliminary discharge to a first time interval;
- and
- driving the plurality of nozzles so as to set the driving time interval between neighboring nozzles in printing to a second time interval longer than the first time interval.
Dependencies are inferred from the claim text.